There were a couple places where the return value wasn't assigned so the
error handling wouldn't trigger.

Fixes: 5c0769af ("ASoC: soc-dai: add snd_soc_dai_bespoke_trigger()")
Fixes: 95aef355 ("ASoC: soc-dai: add snd_soc_dai_trigger()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20190923142257.GB31251@mwandaSigned-off-by: Mark Brown <broonie@kernel.org>